Improvement in machines for trimming and punching roofing-slates



E. ,R. DAVIS. MACHINE FOR TRIMMING Am PUNCHING ROOFING-SLATE.

Patented nee. 21,1875.

O-UTHQGRAPHER WSHINGTON. U C.

UNITED STATES PATENT OFFICE.

EBENEZER R. DAVIS, OF DETROIT, MICHIGAN.

IMPROVEMENT lN MACHINES FOR TRIMMING AND PUNCHING ROOFING-SLATES.

Specification forming part of Letters Patent No. 171,358, dated December21, 1875; application filed October 19, 1875.

To all whom it may concern:

Be it known that I, EBENEZER R. DAVIS, of Detroit, in the county ofWayne and State of Michigan, have invented an Improvement in Machinesfor Trimming and Punching Roofing-Slates, of which the following is aspecification:

My invention has for its object to furnish a machine with which aroofing-slate may be trimmed, and the nail-holes punched at a singleoperation.

The invention consists, principally, in securing the adjustable cuttersand punches to a single hinged frame; further, in combination, with themain stationary frame carrying adjustable bearers and punch-holes, ofthe hinged frame carrying the adjustable cutters and punches, andadapted to be operated by hand; and, further, in the combination oftheoperative parts, all as more fully hereinafter explained.

Figure 1 is a perspective view. Fig. 2 is a plan view. Fig. 3 is anenlarged vertical section of one of the punches.

In the drawing, A represents the main frame, to the rear upper part ofwhich the cutting-frame B is hinged. O G are two bearers, adjustablysecured across the front and back girts of the frame by bolts to,through slots in said girts, so that the said bearers can be adjusted toor from each other, according to the width of the slates to be trimmed.The bearer O has one side turned up, as at forming a guide-flange forone side of the slate, which is laid against it. D is a guide,adjustably secured to the front girt between the bearers, whose frontends may be beveled to cut half-hexagon slate, as shown, or any otherform desired. The outer edges of the beveled ends of the bearers areflanged upwardly, and sharpened to form cutting-edges b. Thecutting-frame B is a structure composed of two parallel iron bars set upedgewise, bent to form three sides of a frame, with spacerblocks betweenthe bars, which are tied 'by bolts through the said spacer-blocks. E Eare the cutters, adjustably secured under the frame diagonally acrossits corners, so as to bring their cutting-edges 0 just outside thecutting-edges of the bearers below. F is a handle across the front edgeof the cuttingframe, which can thereby be lifted up or thrown forciblydown, the impact upon the front girt of the main frame being eased byrubber buffers d on the upper surface of said girt.

To trim a slate the latter is laid on the bearers', one edge bearingagainst the guide 0 and the front end against the guide D, when thecutting-frame may be thrown down, whereupon its knives E E will shearoff the corners of the slate in line with the cutting-edges b of saidbearers. To punch the nail-holes in the slate at the same operation eachbearer is provided with an anvil, Gr, longitudinally adjustable in aslot therein, each anvil having an oval hole through it. Across the topof the cutting-frame a crossbeam, H, is jacked, said beam beingconstructed like the cuttingframe of two parallel iron-bars set upedgewise, and may be moved forward or back by looseningitsjack-bolts. Iare nail-hole punches, each having a screw-shank, which is inserted upthrough the slots of the cross-beam, where it receives a wing-nut, I,which secures it in position to have the point enter the anvilhole,first passing through the slate, as seen in Fig. 3. A spring, J,spirally coiled about the punch, forces 011' the slate when the punch israised.

What Iclaim as my invention is- 1. In a machine for cutting and punchingroofing-slates the combination of the adjustable cutters and punchessecured to a single hinged frame, substantially as described and shown.

2. In a machine for cutting, and punching roofing-slates the combinationof the frame A, carrying adjustable bearers and punch-holes, with thehinged frame B, carrying adjustable cutters and punches, and adapted tobe operated by hand, in the manner substantially as described and shown.

3. In a machine for cutting and punching roofing-slates the combinationof the frame A, carrying the adjustable bearers O O, adjusta ble guideD, and adjustable anvils G of the hinged frame B, carrying theadjustable cutters E, adjustable punches I, springs J, and I handle F,all substantially as described and shown.

EBENEZER R. DAVIS. Witnesses:

v H. F. EBERTS,

H. S. SPRAGUE.

